Push a firewall update on a Saturday and the sales team cannot open email on Monday, with four hours of client outreach lost while IT rolls back. In a small business every system leans on the next: one CRM schema change lands in marketing's targeting and finance's forecasts alike. While systems are down, staff improvise: personal email for work documents, unapproved messaging apps. The outage becomes the exposure. My domino principle piece backs the boring controls: a two-question impact check before any change, no major changes after Thursday. https://altlibre.com/blog/domino-principle-interconnectedness-smb-it #CyberSecurity #InfoSec #SMB